Sahand metallurgy powder Products Company generally has three kinds of Bushes in cylindrical shapes suitable for radial loads, axial flange rolls, spherical for self-lubricating and low voice. A variety of different forms in various shapes are produced based on customers’ requests and based on required technical information. Current tolerance of company is for internal and external diameters and fragment production is possible according to other standards
By comparison, sintered self lubricated bushes have advantages such as silent motion, the impact of the vibrations, low cost of maintenance, no oil leaks, without entanglement, permanent layer of oil film, suitable friction rate, precision, high speed and high load capability at -10 to +100 centigrade degrees temperature
With maximum Iron weight of 98% with specific weight of 5/6 to 6/4 Grams per cubic centimeter .These bushes’ generation are designed for linear speed of 4 meters per second
It’s made of cu90Sn10 bronze, with fat graphite percentage weight of 6/4 to 7/2 grams per cubic centimeter. These bushes are designed for linear speed of 5 meters per second. Both types of materials have shock absorber feature, Minimum hardness of both bushes is 25 Brinell .Their average Lives is between 3000 to 5000 hours
Dimensions of bushes are designed according to the exerted Special Forces on the bushes, number of the shaft’s turn, Bush longevity, sliding of the shaft inside the Bush with appropriate materials. Cylindrical bushes’ tolerance is calculated based on internal diameter G7 and external diameter S7 for smaller than 50mm and length of JS13 and edged bushes are calculated based on internal diameter G7 and external diameter S7 for smaller than 50mm,length of diameter and edge thickness of JS13 and spherical bushes are calculated based on internal diameter H7,diameter of the sphere H11,and length JS13.The difference between the outer diameter of the inner TIR is acceptable based on 50 micron for bushes that are smaller than 25mm and 70micron and for bushes that have external diameter larger than 25mm.Other standard tolerances will be surveyed and produced based on customers’ request
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Powder metallurgy is a small but important part of the metallurgical industry